[kuh m-buhst]

verb (used with or without object)

to burn.


Nearby words

  1. combings,
  2. combining form,
  3. combining weight,
  4. combo,
  5. combo store,
  6. combustible,
  7. combustion,
  8. combustion chamber,
  9. combustion engine,
  10. combustion tube

Origin of combust

1325–75; Middle English < Latin combūstus (past participle of combūrere to burn up, equivalent to com- com- + -ūs- variant stem of ūrere to burn + -tus past participle suffix; -b- by misanalysis of ambūrere, another derivative, as am- + -būrere) Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for combust

British Dictionary definitions for combust



astrology (of a star or planet) invisible for a period between 24 and 30 days each year due to its proximity to the sun


chem to burn
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for combust


late 14c. as an adjective, "burnt," from Old French combust (14c.), from Latin combustus, past participle of combuere "to burn up, consume" (see combustion). Also an astrological term for planets when near the sun. The verb is attested from late 15c. Related: Combusted; combusting.

Online Etymology Dictionary, © 2010 Douglas Harper